翼盒的顶部有两块表面板材，底部有三块板材。
The top surface of the wing box has two skin panels, and the bottom surface has three panels.
本文研究了翼盒结构的可靠性分析及基于系统可靠性的结构优化设计方法。
The methods of system reliability analysis and optimization for wing-box structures are studied in this paper.
翼盒为机翼主要承力部件，优化潜力较大，是机翼结构优化设计的重点对象。
As the main load-bearing structure, wing box is one of the main optimization objects which has great potential of weight reduction.
应用推荐